denman



G. E. DENMAN.

PUMP.

APPLICATION FILED FEB. I, 19W.

Patented Nov. 18; 1919.

mvswron ive/mm n-rromrs WITNESSES -e. E. DENMAN.

PUMP.

APPLICATION FILED FEB. I, 19l8.

1 322,483. Patelifed Nov. 18, 1919.

2 SHEETS-SHEET 2.

WITNESSES man /ran ifianmam 2 w nrroimm GEORGE E. DENMAN, OF FRUITVALE,CALIFORNIA.

PUMP.

Specification of Letters Patent 1%, ,1 49 'l gd'N 18 1919.

Application filed February 1, 1918. Serial No. 214,896.

To all whom it may concern Be it known that I, GEORGE E. DENMAN, citizenof the United States, and a resident of Fruitvale, in the county ofAlameda and State of California, have invented a new and Improved Pump,of which the following is a full, clear, and exact description.

My invention relates to pumps of the air lift type, and an object of theinvention is to provide a simple, efficient and inexpensive ump.

Another object of the invention is to provide an air lift pump in whichthe air supplied is controlled automatically by a trip mechanismactuated by an intermittent water flow, also automatically operated bythe same trip mechanism.

With'the above and other objects in view, the nature of whichwill morefully appear as the description proceeds, the invention consists in thenovel construction, combination and arrangement of parts as herein fullydescribed, illustrated and claimed.

In the accompanying drawings, forming part of the application, similarcharacters of reference indicate corresponding parts in all the views.

Figure 1 is a section through the pump and an elevation of the tripmechanism controlling the operation of the pump;

Fig. 2 is a section on line 22, Fig. 1;

Fig. 3 is a section on line 33, Fig. 2; and

Fig. 4: is' a section on line H, Fig. 2.

Referring to the drawings, 5 is a cylinder which isadapted'to besubmerged so that the top of same is slightly below the water level, asshown in Fig. 1; It has a valve 6 at the bottom which controls theinflow of water from the valve into the cylinder. An outlet conduitprojects through the top of the cylinder, a portion of same extendingfrom the top to substantially the bottom of the cylinder whereat a valve8 is provided which checks the How from the outlet conduit into thecylinder. The outlet conduit 7 has an enlarged section 9 at a suitabledistance above the cylinder into which the reduced endlO of an ejectorconduit l'l'extends. The end 10 of the conduit 11 is held centrally inthe section 9 by the apertured member 9 The said conduit 11 extendswithin the outlet conduit 7 and enters the cylinder 5 below the top butabove conduit 11 into the cylinder.

An air supply conduit 13 is connectedto the top of the cylinder todischarge air thereinto. The conduit is provided with a valve 1 1 whichis alternately opened and closed by a trip box 15. The trip box has arms16 extending along each side which are secured at the top of the box andwhich bear with their lower ends in boxes 17 housed in' extensions 18 ofthe tank 19 provided under the box 15. As will be seen from Fig. 1, thetrip box 15 in elevation has the shape of an isosceles triangle. Theaxis of oscillation of the box is at the base and, therefore, below thecenter of gravity of the box. To each of the sloping faces of the box awater jet may be directed from the valve 20 disposed above the trip boxand presenting two discharge conduits 21, one for each of the slopingfaces.

The valve 20 is connected to a tank 22 the water in which is maintainedat a predetermined level by means of a valve. 23 operable by a fioat24.The flow from the tank to the conduits 21 through the valve 20 iscontrolled by a valve 25 mounted on a shaft 26 slidably mounted in thevalve 20. The casing of the valve 20 presents suitable valve seats 27for the valve 25 so as to bring into communication either of theconduits 21 with the tank while the other conduit is out off. The shaft26 is operated by a lever 28 which is actuated by the trip box 15 (seeFig. 1). The displacement of the trip box on its axis is limited bystays 29 rising from the tank 19.

As shown in Fig. 1 the valve 20 is in a position so that water can flowfrom the tank through the left conduit 21'. In consequence, the tripbox, under the influence of the falling water, will oscillate on itsaxis to the position shown in dotted line.

In the movement of the box the lever 28 displaces the valve 25, therebycutting off the flow from the left-hand conduit 21 and opening to theright-hand conduit 21, there by reversing the movement of the. box-Since the valve 14 is connected to the trip box it will open and'closeduring. the oscil-" latory movement of the box. As shown; in

full lines in Fig. 1, the valve 14: is open.

The dotted position of the samefigure shows the valve'closed. The airoutlet from the cylinder is controlled-by a valve 30 which is operableby a trip box 31 identical with the trip box 15 and Similarly mountedabove a tank 32.

I Thetrip box 31 is disposed below the tank 'It will therefore be notedthat when the '19 so that the water from said tank may discharge on tothe trip box 31 to operate the same. The trip boxes 15 and 31 each havean arm 33 constrained to move with the box. The two arms are connectedby a rod 34:. The rod 3 1 has a slot 35 so that the same has. amovementrelative to the arm 33 ofthe box 31. The slot islong enough'toallowanoscillation of the upper trip box 15 without causing the lowertrip box 31'to oscillate. As the upper trip box 15 is oscillated fromthe position shown in full line to that shown in dotted line in Fig. 1,

the lower box remains in the position shown in full lines in Fig. 1.,The lower box is caused to operate by waterdischarged from' tion showninjfull line. When the lower trip box 31 is in the position shownin fullline, the] valve 30' is in closed position. When-it is in the positionshown in dotted lines in Fig. 1, the valve is in open position.

valve 14 is 010866., the valve 30 is not opened immediately, thus theair forced into the cylinder 5 .is allowed to do its'work.

by expansionbefore it is exhausted from the cylinder through the valve30.

Tov properly timethe'operation of the tripbox 31' relative to'the tripbox 15, a partition 37 is provided withinthe tank 19 which divides thetank into right and lefthand sections, the right-hand section hav-' inga discharge at 38 leading to the sewer; The lefthand'section of thetankhas a discharge conduit 39 which discharges on to the trip box 31. Toprevent the immediate eiiect of the water falling into the left-handsection ofthe tank 19, a siphoning head 40 is provided onthe conduit'39.

The provision of a check valve-12 on the ejector conduit 11 checks waterfrom dropping back'into the pumpbylinder when the" air isfexhausted and,therefore, reduces slippage; Further1nore,itrequires ailower initialpressure to start the upward flow vof water, due to'the fact that acertain por-f tion ofthewater is being prevented from dropping by thecheck valve 12, and, there fore, no efi'ort is; necessary again to raisethat part of the water. Experiments have shown that with the check valvethe pump can be worked with forty pounds pressure, in place ofsixty-nine without the check valve.

I claim:

1; In combination with an air-lift pump having an air inlet and an airoutlet,.a tripping mechanism connected to the air inlet, a trippingmechanism disposed below'the; 7e first mentioned tripping mechanism andconnectedto t'heair outlet, means for supplying waterjets to the firsttripping mechanism, means for controlling said jet-supplying meansoperable the first tripping mechanism, and means between the first andsecond tripping mechanisms adapted to accumulate the water from thejetsvto the first tripping mechanism and operate-the second trippingmechanism.

2. In combination with an air-.liftlpump having anair inlet and an airoutlet, a tripping mechanism for operating the air inlet, a secondtripping mechanism below the first tripping mechanism for operating theair outlet, a tank below the first tripping mocha-V nism having meansfor discharging on to the second ripping mechanism, a pair of conduitsadapted to discharge water on the;- first tripping mechanism whereby thesame is operated, a valve for supplying water to either of the conduits,a lever for operating said valve connected to'the firsttripping 1mechanism, and means connecting the, two tripping mechanisms so'that theupper one. will operate thelower one when moving in one direction butnot when moving'in the opposite direction. I

- 3. In combinationwith an air-lift pump having an air mlet and anairoutlet, a tripplng mechanlsm for operating the inlet, a

7 pair o1 conduits adapted to discharge water on the tripping mechanism,a tankhaving compartments for receiving the water' from each of theconduits, a second tripping mechanism below the tank, means in one ofthe compartments for discharging water on to the second trippingmechanism, a valve for said pair of conduits, a lever for operating saidvalve so that the water isfswitched from one to the other conduit, saidlever be- 7 ing operable by the first tripping mechanism, and meansconnecting the. two trip ping mechanisms so that the. upper one willoperate, the lower one in} one direction only, the said lower one beingoperated inthe other direction the water from '1 the" compartment havinga conduit to dis chargeron' to the secondtripping. mechanism. i

a.. 1n combinatlon with an air-lift pump 1% having an 'a1r mlet and'anair outlet, a trip ping box moun ed to oscillate, saidtripping boxpresenting a pair of sloping sides, a conduit for discharging water onto each of the sloping sides, a. valve forsaidcon- @130 duits, a leverfor operating said valve to discharge successively through saidconduits, said lever being operable by said box, a lever connecting thetripping box to the air inlet, a second tripping box of similarconstruction to the first, a lever connecting said second box to the,air outlet, means connecting the two boxes so that the upper one willoperate the lower one when moving in one direction only and means foraccumulating the water coming from one of said conduits to the first boxand discharge it on to the other box to operate said box in the otherdirection.

5. In combination with an air-lift pump having an air inlet and an airoutlet, a tripping mechanism for operating the air inlet, means forsupplying water jets to the tripping mechanism for operating the same, avalve controlling the jets operable by the movement of the trippingmechanism, a second tripping mechanism disposed below the first foroperating the air outlet, an arm constrained to move with each of saidtripping mechanisms, a rod connecting said arms, said rod having a slotwhich is engaged by the arm of the lower tripping mechanism whereby saidlower tripping mechanism is operated by the upper tripping mechanism inone direction only, and means for accumulating the water discharged bythe jets on to the first tripping mechanism and discharging it on to thesecond tripping mechanism, whereby said second tripping mechanism isoperated in the other direction.

GEORGE E. DENMAN.

